MAPREDUCE-4791. Javadoc for KeyValueTextInputFormat should include default separator and how to change it (Akira AJISAKA via aw)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617979 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -89,6 +89,9 @@ Trunk (Unreleased)
     MAPREDUCE-883. harchive: Document how to unarchive (Akira AJISAKA and
       Koji Noguchi via aw)
 
+    MAPREDUCE-4791. Javadoc for KeyValueTextInputFormat should include default 
+      separator and how to change it (Akira AJISAKA via aw)
+
   BUG FIXES
 
     MAPREDUCE-5714. Removed forceful JVM exit in shutDownJob.  

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/KeyValueTextInputFormat.java

@@ -38,6 +38,9 @@ import org.apache.hadoop.mapreduce.TaskAttemptContext;
  * Either line feed or carriage-return are used to signal end of line. 
  * Each line is divided into key and value parts by a separator byte. If no
  * such a byte exists, the key will be the entire line and value will be empty.
+ * The separator byte can be specified in config file under the attribute name
+ * mapreduce.input.keyvaluelinerecordreader.key.value.separator. The default
+ * is the tab character ('\t').
  */
 @InterfaceAudience.Public
 @InterfaceStability.Stable